Auger



No. 770,480. PATENTED SEPT. 20, 1904. G. A. STANGER.

AUGER.

APPLICATION FILED JUNE 13, 1903. RENEWED FEB. 27. 1904.

N0 MODEL.

WITNESSES [JV Vii/V102? .21 Ziorney UNITED STATES Patented September 20,1904.

PATENT OFFICE.

AUGER.

SPECIFICATION forming part of Letters Patent No. 770,480, datedSeptember 20, 1904.

Application filed June 13, 1903. Renewed February 27, 1904. Serial No.195,673. (No model.)

To (l/ZZ whom, it may concern: 7

Be it known that I, GUsTAv'A. STANGER, a citizen of the United States,residing at East Brimfield, in the county of Hampden and State ofMassachusetts, have invented certain new and useful Improvements inAugers; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to augers for the use of carpenters and others;and it consists in the novel construction of the anger as hereinafterfully described and claimed.

In the drawing the figure is a side view of an auger constructedaccording to this invention.

The auger is formed of a series of spiral coils A, which are conical attheir peripheries b. The conical portions are arranged at an angle ofabout twelve degrees, as indicated by the dotted lines in the drawing,and the smaller parts of the conical portions are arranged toward thegimlet end or point 0 of the auger.

The auger is provided with a shank (Z of any approved form for operatingit.

The coils A are all of the same diameter, and they are Wound upon acentral bar in the process of manufacture. This bar is subsequentlyremoved, so that there is a central opening at the axis of the augerbetween its coils.

An auger formed in this manner clears itself as it is drawn out from itsholes, and it is therefore easier to withdraw and less liable to bebroken. It is proportionally stronger and it Works more freely,particularly in green wood;

What I claim is An auger formed of a series of coils'of the samediameter arranged around a central opening and being conical at theirperipheries.

In testimony whereof I afiix my signature in presence of two witnesses.

GUSTAV A. STANGER.

Witnesses:

M. ELIZABETH COCHRAN, MANLEY B. TOWNSEND.

